Hello,
Check these Articles:
Best Practices for Symantec Endpoint Protection Location Awareness
http://www.symantec.com/docs/TECH98211
Location Awareness Logic
http://www.symantec.com/docs/TECH97097
Location Awareness using Multiple Management Server Lists
https://www-secure.symantec.com/connect/articles/location-awareness-using-multiple-management-server-lists
More about Location Awareness in Symantec Endpoint Protection (SEP)
http://www.symantec.com/docs/TECH97369
How to Use Location Awareness as Fault Tolerance for Content Updates
http://www.symantec.com/docs/TECH94265
Managed Load Balancing: Setting up Management Server Lists based on locations in Symantec Endpoint Protection Manager.
http://www.symantec.com/docs/TECH104582
How To Optimize Endpoint Protection for Branch Offices using GUPs, Load Balancing, and Location Awareness
http://www.symantec.com/docs/TECH94122
Hope that helps!!